TWebbrowser and proxy settings problem [Edit]

I use a TWebBrowser and I need to add proxy settings. To do it I use this code:

function SetProxy(UserAgent, Address: string): Boolean;
  dwBufSize: DWORD;
  hInternet: Pointer;
  Options :array[1..3] of INTERNET_PER_CONN_OPTION;
  Result := False;
  dwBufSize := sizeof(list);
  list.dwSize := sizeof(list);
  list.pszConnection := Nil;
  list.dwOptionCount:= High(Options);
  Options[1].dwOption := INTERNET_PER_CONN_FLAGS;
  Options[1].Value.dwValue := PROXY_TYPE_DIRECT or PROXY_TYPE_PROXY;
  Options[2].dwOption := INTERNET_PER_CONN_PROXY_SERVER;

    Options[2].Value.pszValue := PAnsiChar(AnsiString(Address));
    Options[2].Value.pszValue := PChar(Address);

  Options[3].dwOption := INTERNET_PER_CONN_PROXY_BYPASS;
  Options[3].Value.pszValue  := '<local>';

  list.pOptions := @Options;

  hInternet := InternetOpen(PChar(UserAgent), INTERNET_OPEN_TYPE_DIRECT, nil, nil, 0);
  if hInternet <> nil then
    Result := InternetSetOption(hInternet, INTERNET_OPTION_PER_CONNECTION_OPTION, @list, dwBufSize);
    Result := InternetSetOption(hInternet, INTERNET_OPTION_REFRESH, nil, 0);

It works very well on Delphi 7 but if I try to compile my application in Delphi 2010 I have a problem, after I call SetProxy function TWebBrowser works always also with fake proxy settings (for example address=999.999.999.999:9999). In Delphi 2010 TWebBrowser don't use the proxy but a direct connection also after SetProxy function.

Can you help me to underestand why?

Edited by: Martin Masci on Apr 2, 2010 7:30 AM
4/2/2010 2:30:12 PM
embarcadero.delphi.winsock 1874 articles. 2 followers. Follow

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<Martin Masci> wrote in message

>    Options[2].Value.pszValue := PAnsiChar(AnsiString(Address));
>  {$Else}
>    Options[2].Value.pszValue := PChar(Address);
>  {$EndIf}

You should not do that.  The INTERNET_PER_CONN_OPTION is fully 
Unicode-enabled.  Remove the UNICODE check and just use the PChar() cast 

> It works very well on Delphi 7 but if I try to compile my
> application in Delphi 2010 I have a problem, after I call
> SetProxy function TWebBrowser works always also
> with fake proxy settings (for example address=999.999.999.999:9999).

Your UNICODE check is making your code assign a PAnsiChar (and an invalid 
one at that!) where a PWideChar is expected instead.

Remy Lebeau (TeamB)
4/4/2010 12:50:55 AM

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